PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

950-3Washer,concave

Department of the Air Force · NSN 5310-01-471-5320 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-471-5320 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-471-5320. Primary manufacturer part number: 950-3.
Features
  • Washer,concave — FSC 5310
  • Surface Treatment: CADMIUM OR ZINC OVERALL
  • Material: STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OR STEEL COMP 1021 OR STEEL COMP 1022 OR STEEL COMP 1023 OR STEEL COMP 1524 OR STEEL COMP 1025 OR STEEL COMP 12L14 OVERALL
  • Hardness Rating: 70.0 ROCKWELL B MINIMUM AND 85.0 ROCKWELL B MAXIMUM
  • Surface Finish: 63.0 MICROINCHES ALL SURFACES
  • Material Document and Classification: MIL-S-7097 MIL SPEC SINGLE MATERIAL RESPONSE OR QQ-S-698 FED SPEC SINGLE MATERIAL RESPONSE OR ASTM A108-81, CONDITION: COLD DRAWN ASSN STD SINGLE MATERIAL RESPONSE OVERALL
  • Surface Treatment Document and Classification: QQ-P-416,TYPE 1,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OR QQ-Z-325,TYPE 1,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
  • Style Designator: CONCAVE
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 1018 or Steel Comp 1019 or Steel Comp 1020 or Steel Comp 1021 or Steel Comp 1022 or Steel Comp 1023 or Steel Comp 1524 or Steel Comp 1025 or Steel Comp 12l14 Overall construction
General Description

The Washer,concave, cataloged under National Stock Number 5310-01-471-5320, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Department of the Air Force. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-01-471-5320
Primary Part Number950-3
Item NameWasher,concave
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerDepartment of the Air Force
StatusACTIVE
Surface TreatmentCADMIUM OR ZINC OVERALL
MaterialSTEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OR STEEL COMP 1021 OR STEEL COMP 1022 OR STEEL COMP 1023 OR STEEL COMP 1524 OR STEEL COMP 1025 OR STEEL COMP 12L14 OVERALL
Hardness Rating70.0 ROCKWELL B MINIMUM AND 85.0 ROCKWELL B MAXIMUM
Surface Finish63.0 MICROINCHES ALL SURFACES
Material Document and ClassificationMIL-S-7097 MIL SPEC SINGLE MATERIAL RESPONSE OR QQ-S-698 FED SPEC SINGLE MATERIAL RESPONSE OR ASTM A108-81, CONDITION: COLD DRAWN ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Surface Treatment Document and ClassificationQQ-P-416,TYPE 1,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OR QQ-Z-325,TYPE 1,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
Style DesignatorCONCAVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
3110-00-100-23631203L-1B1 INTERCHANGEABLE
Bearing,ball,annular
Schatz Bearing Corporation Dba Schatz Bearing Corp
7920-00-223-80059503 INTERCHANGEABLE
Brush,acid Swabbing
Jason Incorporated Dba Osborn International a Unit of Jason
5360-00-291-5443 INTERCHANGEABLE
Spring,helical,compression
5950-01-131-99759100-3560 INTERCHANGEABLE
Coil,radio Frequency
Keysight Technologies Inc
5820-01-165-4421MX-10282/SRC INTERCHANGEABLE
Distribution Unit,hydraulic
Joint Electronics Type Designation System
6145-01-191-73572460AT3M INTERCHANGEABLE
Cable,special Purpose,electrical
Tappan Wire and Cable Inc
5998-01-367-8876901-01 ITEM 3 INTERCHANGEABLE
Backplane Assembly
Hose-Mccann Telephone Co, Inc
5340-01-494-7955 INTERCHANGEABLE
Door,access,utility
Cross-Reference Index
Part NumberManufacturer
950-3 Department of the Air Force (USA)
Related Parts
3110-00-100-2363INTERCHANGEABLE
BEARING,BALL,ANNULAR
1203L-1B1
7920-00-223-8005INTERCHANGEABLE
BRUSH,ACID SWABBING
9503
5360-00-291-5443INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
5950-01-131-9975INTERCHANGEABLE
COIL,RADIO FREQUENCY
9100-3560
5820-01-165-4421INTERCHANGEABLE
DISTRIBUTION UNIT,HYDRAULIC
MX-10282/SRC
6145-01-191-7357INTERCHANGEABLE
CABLE,SPECIAL PURPOSE,ELECTRICAL
2460AT3M
5998-01-367-8876INTERCHANGEABLE
BACKPLANE ASSEMBLY
901-01 ITEM 3
5340-01-494-7955INTERCHANGEABLE
DOOR,ACCESS,UTILITY

Frequently Asked Questions

What is NSN 5310-01-471-5320?

NSN 5310-01-471-5320 is a Washer,concave, manufactured by Department of the Air Force, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-01-471-5320?

NSN 5310-01-471-5320 has 1 cross-referenced part number: 950-3 (Department of the Air Force).

What NSN replaces 5310-01-471-5320?

There are 8 known substitutes for 5310-01-471-5320: 3110-00-100-2363, 7920-00-223-8005, 5360-00-291-5443 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 950-3?

Key specifications for 950-3: End Item Identification: CH-53G G; Surface Treatment: CADMIUM OR ZINC OVERALL; Special Features: ROCKWELL HARDNESS PERTAINS TO QQ-S-698; Material: STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OR STEEL COMP 1021 OR STEEL COMP 1022 OR STEEL COMP 1023 OR STEEL COMP 1524 OR STEEL COMP 1025 OR STEEL COMP 12L14 OVERALL. 9 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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